TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE H: NOISE
CHAPTER I: POLLUTION CONTROL BOARD
PART 900
GENERAL PROVISIONS
Section
900.101 Definitions
900.102
Prohibition of Noise Pollution
900.103 Measurement Procedures
900.104
Burden of Persuasion Regarding Exceptions
900.105
900.106
Severability
Incorporation by Reference
APPENDIX A
Old Rule Numbers Referenced
AUTHORITY: Implementing Section 25 and authorized by Section 27 of the
Environmental Protection Act [415 ILCS 5/25 and 27].
SOURCE: Originally filed as Part 1 of Chapter 8: Noise Pollution, effective August 10,
1973; amended at 2 Ill. Reg. 27, p. 223, effective June 26, 1978; amended at 5 Ill.
Reg. 6371, effective June 1, 1981; amended at 5 Ill. Reg. 8533, effective August 10,
1981; amended at 6 Ill. Reg. 10960, effective September 1, 1982; codified at 7 Ill. Reg.
13579; amended in R83-7 at 11 Ill. Reg. 3121, effective January 28, 1987; amended in
R03-8 at 27 Ill. Reg. 16247, effective October 8, 2003.
Section 900.101 Definitions
Except as stated and unless a different meaning of a term is clear from its context, the
definitions of terms used in this Chapter are the same as those used in the Environmental
Protection Act. All definitions of acoustical terminology must be in conformance with
those contained in American National Standards Institute (ANSI) S1.1 – 1994 (R1999)
“American National Standard Acoustical Terminology”and S12.9- 1988 (R1998)
“American National Standard Quantities and Procedures for Description and
Measurement of Environmental Sound - Part 1,” incorporated by reference at Section
900.106. As used in 35 Ill. Adm. Code 900 through 910, the following terms mean:
A-Weighted Sound Level: 10 times the logarithm to the base 10 of the square of
the ratio of the A-weighted (and time-averaged) sound pressure, to the reference
sound pressure of 20 micropascal. The frequency and time weighting must be
specified in accordance with ANSI S1.4–1983 (R2001) “American National
Standard Specification for Sound Level Meters”, incorporated by reference at
Section 900.106. The unit of sound level is the decibel (dB) with the letter (A)
appended to the decibel unit symbol to indicate the frequency weighting and
written as dB(A).
Ambient: the all-encompassing sound associated with a given environment
without contributions from the noise source or sources of interest.
Angle of incidence: the orientation of the microphone relative to the sound
source.
ANSI: American National Standards Institute or its successor bodies.
Antique vehicle: a motor vehicle that is more than 25 years of age or a bona fide
replica thereof and which is driven on the highways only going to and returning
from an antique auto show or an exhibition, or for servicing or demonstration, or
a fire-fighting vehicle more than 20 years old which is not used as fire-fighting
equipment but is used only for the purpose of exhibition or demonstration.
Background ambient sound level: means the ambient sound level, measured in
accordance with the procedures specified in 35 Ill. Adm. Code 910.
Bus: every motor vehicle designed for carrying more than 10 passengers and
used for the transportation of passengers; and every motor vehicle, other than a
taxicab, designed and used for the transportation of persons for compensation.
C-weighted sound level: in decibels, a frequency-weighted sound pressure level,
determined by the use of the metering characteristics and C-weighted network
specified in ANSI S1.4-1983 (R2001) “ American National Standard
Specification for Sound Level Meters.,” incorporated by reference at Section
900.106.
Construction: on-site erection, fabrication, installation, alteration, demolition or
removal of any structure, facility, or addition thereto, including all related
activities including, but not restricted to, clearing of land, earth-moving, blasting
and landscaping.
Daytime hours: 7:00 am to 10:00 pm, local time.
dB(A): see “A-weighted sound level in decibles.”
Dealer: every person engaged in the business of selling vehicles to persons who
purchase such vehicles for purposes other than resale, and who has an established
place of business for such activity in this state.
Decibel (dB): a unit of measure, on a logarithmic scale to the base 10, of the ratio
of the magnitude of a particular sound pressure to a standard reference pressure,
which, for purposes of this Chapter, shall be 20 micronewtons per square meter
(μN/m
2
) or 20 micropascals (
µ
Pa).
Discrete tone: a sound wave whose instantaneous sound pressure varies
essentially as a simple sinusoidal function of time.
Exhaust system: the system comprised of a combination of components which
provides for the enclosed flow of exhaust gas from engine parts to the
atmosphere.
Existing property-line-noise-source: any property-line-noise-source, the
construction or establishment of which commenced prior to August 10, 1973. For
the purposes of this sub-section, any property-line-noise-source whose A, B or C
land use classification changes, on or after August 10, 1973, is not considered an
existing property-line-noise-source.
Farm tractor: every motor vehicle designed and used primarily as a farm
implement for drawing wagons, plows, mowing machines and other implements
of husbandry, and every implement of husbandry which is self-propelled.
Fast Dynamic Characteristic: the dynamic characteristic specified as fast in ANSI
S1.4-1983 (R-2001) “American National Standard Specification for Sound Level
Meters,” incorporated by reference at Section 900.106.
Fast meter response: as specified in ANSI, S1.4–1983 (R2001) “American
National Standard Specification for Sound Level Meters,” incorporated by
reference at Section 900.106.
Fluctuating sound: a class of nonsteady sound where sound pressure level varies
over a range greater than 6 decibels (dB) with the “slow” meter characteristic, and
where the meter indication does not equal the ambient level more than once
during the period of observation.
Frequency-weighted sound pressure: root mean square of the instantaneous
sound pressure which is frequency-weighted (i.e., filtered) with a standard
frequency characteristic (e.g., A or C) and exponentially time-weighted in
accordance with the standardized characteristics slow (S), fast (F), impulse (I) or
peak, with both weightings specified in accordance with ANSI S1.4–1983
(R2001) “American National Standard Specification for Sound Level Meters,”
incorporated by reference at Section 900.106. The frequency weighting used
shall be specified explicitly (e.g., A, C or octave band). The unit frequency-
weighted sound pressure is the pascal (Pa).
Gross Vehicle Weight (GVW): the maximum loaded weight for which a motor
vehicle is registered or, for vehicles not so registered, the value specified by the
manufacturer as the loaded weight of the vehicle.
Highly Impulsive Sound: either a single pressure peak or a single burst (multiple
pressure peaks) for a duration usually less than one second. Examples of highly
impulsive sound sources are drop forge hammer and explosive blasting.
Highway: the entire width between the boundary lines of every way publicly
maintained when any part thereof is open to the use of the public for purposes of
vehicular travel.
IHRA: International Hot Rod Association or its successor body.
Intermittent sound: a class of nonsteady sound where the meter indicates a sound
pressure level equal to the ambient level two or more times during the
measurement period. The period of time during which the level of the sound
remains at a value different from that of the ambient is of the order of one second
or more.
LBCS: the Land-Based Classification Standards which designate land, use
functions by means of numeric codes.
Leq: equivalent continuous sound pressure level in decibels: 10 times the
logarithm to the base 10 of the ratio of a time mean square sound pressure, during
the specified time period, to the square of reference sound pressure. The
reference sound pressure is 20 micronewtons per square meter or equivalent
continuous frequency-weighted sound pressure.
Leq (A): A-weighted time-average (equivalent-continuous) sound pressure level.
Leq (octave band-Hz): time-average (equivalent-continuous) sound pressure level
in the octave band specified by its center frequency e.g. Leq (125-Hz).
Measurement Period: the time interval during which acoustical data are obtained.
The measurement period is determined by the characteristics of the noise being
measured and must be at least ten times as long as the response time of the
instrumentation. The greater the variation in indicated sound level, the longer
must be the observation time for a given expected precision of the measurement.
Motor driven cycle: every motorcycle, motor scooter, or bicycle with motor
attached, with less than 150 cubic centimeter piston displacement.
Motor vehicle: every vehicle which is self-propelled and any combination of
vehicles which are propelled or drawn by a vehicle which is self-propelled.
Motorcycle: every motor vehicle having a seat or saddle for the use of the rider
and designed to travel on not more than 3 wheels in contact with the ground, but
excluding a tractor.
Muffler: a device for abating the sounds of escaping gases of an internal
combustion engine.
New snowmobile: a snowmobile, the equitable or legal title to which has never
passed to a person who purchases it for purposes other than resale.
Nighttime hours: 10:00 pm to 7:00 am, local time.
Noise floor: the electrical noise (in decibels) of the sound measurement system.
When the noise floor is determined by placing a calibrator over the microphone of
the sound measurement system, the noise floor may include acoustic noise due to
leakage around the calibrator.
Noise pollution: the emission of sound that unreasonably interferes with the
enjoyment of life or with any lawful business or activity.
Non-steady sound: a sound whose sound pressure level shifts significantly during
the measurement period. Meter variations are greater than +/- 3 dB using the
“slow” meter characteristic.
Octave band sound pressure level: the sound pressure level for the sound being
measured contained within the specified octave band. The reference pressure is
20 micronewtons per square meter.
Pascal (Pa): a unit of pressure. One pascal is equal to one newton per square
meter.
Passenger car: a motor vehicle designed for the carrying of not more than ten
persons, including a multi-purpose passenger vehicle, except any motor vehicle of
the second division as defined in 625 ILCS 5/1-146, and except any motorcycle or
motor driven cycle.
Person: any individual, corporation, partnership, firm, association, trust, estate,
public or private institution, group, agency, political subdivision of this State, any
other State or political subdivision or agency thereof or any legal successor,
representative, agent or agency of the foregoing.
Preferred frequencies: those frequencies in Hertz preferred for acoustical
measurements which, for the purposes of this Chapter, consist of the following set
of values: 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500,
630, 800, 1000, 1250, 1600, 2000, 2500, 3150, 4000, 5000, 6300, 8000, 10,000,
12,500.
Prominent discrete tone: sound, having a one-third octave band sound pressure
level which, when measured in a one-third octave band at the preferred
frequencies, exceeds the arithmetic average of the sound pressure levels of the
two adjacent one-third octave bands on either side of such one-third octave band
by:
5 dB for such one-third octave band with a center frequency from 500
Hertz to 10,000 Hertz, inclusive. Provided: such one-third octave band
sound pressure level exceeds the sound pressure level of each adjacent
one-third octave band, or;
8 dB for such one-third octave band with a center frequency from 160
Hertz to 400 Hertz, inclusive. Provided: such one-third octave band
sound pressure level exceeds the sound pressure level of each adjacent
one-third octave band, or;
15 dB for such one-third octave band with a center frequency from 25
Hertz to 125 Hertz, inclusive. Provided: such one-third octave band
sound pressure level exceeds the sound pressure level of each adjacent
one-third octave band.
Property-line-noise-source: any equipment or facility, or combination thereof,
which operates within any land used as specified by 35 Ill. Adm. Code 901.101.
Such equipment or facility, or combination thereof, must be capable of emitting
sound beyond the property line of the land on which operated.
Quasi-steady sound: a train of two or more acoustical impulses. Examples of
quasi-steady sound are that from riveting and pneumatic hammer.
Reflective surface: any building, hillside, or similar object (other than the flat
ground surface) that reflects sufficient sound to affect the sound pressure level
readings obtained from a noise source. Not included as reflective surfaces are
small objects such as trees, posts, chain-linked fences, fire hydrants, vegetation
such as bushes and shrubs, or any similar object.
Registered: a vehicle is registered when a current registration certificate or
certificates and registration plates have been issued for it under the laws of any
state pertaining to the registration of vehicles.
Residential dwelling unit: all land used as specified by the Land-Based
Classification Standards (LBCS) Codes 1100 through 1340 and those portions of
land used as specified by LBCS Code 6222 used for sleeping.
SAE: Society of Automotive Engineers.
Slow Dynamic Characteristic: the dynamic characteristic specified as "Slow" in
ANSI S1.4–1983 (R2001) " American National Standard Specification for Sound
Level Meters,” incorporated by reference at Section 900.106.
Snowmobile: a self-propelled device designed for travel on snow or ice or natural
terrain steered by skis or runners, and supported in part by skis, belts, or cleats.
Sound: a physical disturbance causing an oscillation in pressure in a medium
(e.g., air) that is capable of being detected by the human ear or a sound measuring
instrument.
Sound exposure (SE): time integral of squared, frequency-weighted
instantaneous sound pressure over a given time interval. The time period of
integration must be specified: when the sound exposure of the background noise
is a significant contributor to the total sound exposure; or when the threshold
sound level of the instrument (a level below which the instrument does not
accumulate contributions to the integral) used is above the level of the
background noise; or when such data is needed to identify a source; or when the
time period of integration is otherwise useful. The customary unit for sound
exposure is pascal-squared second (Pa
2
-s).
Sound exposure level (SEL or LeT): 10 times the logarithm to the base 10 of the
ratio of sound exposure to the reference sound exposure (Eo) of 400 micropascal-
squared seconds (μPa
2
-s). For a given measurement time period of T seconds, the
sound exposure level (LeT ) is related to the time-average sound level (LpT) as
follows: LeT = LpT+ log (T/to) where to is the reference duration of 1 second. The
time period of intergration (T) must be specified. The frequency weighting used
must be specified explicitly (e.g., A, C or octave band). The A-weighted SEL
and C-weighted SEL are abbreviated ASEL and CSEL respectively. An octave
band SEL is expressed in terms of the center frequency (e.g., SEL at 125-Hz).
The unit for sound exposure level is decibel (dB).
Sound level (weighted sound pressure level): 20 times the logarithm to the base
10 of the ratio of the frequency-weighted (and time-averaged) sound pressure to
the reference pressure of 20 micropascals. The frequency weighting used shall be
specified explicitly (e.g., A, C or octave band). The unit for sound level is decibel
(dB).
Sound pressure: the root mean square of the instantaneous sound pressures
during a specified time interval in a stated frequency band. The unit for sound
pressure is pascal (Pa).
Sound pressure level: 20 times the logarithm to the base 10 of the ratio of the
particular sound pressure to the reference sound pressure of 20 micropascals.
ANSI S12.9- 1988 (R1998) “American National Standard Quantities and
Procedures for Description and Measurement of Environmental Sound - Part 1,”
incorporated by reference at Section 900.106, reserves the term sound pressure
level to denote the unweighted sound pressure. The unit for sound pressure level
is decibel (dB).
Special mobile equipment: every vehicle not designed or used primarily for the
transportation of persons or property and only incidentally operated or moved
over a highway, including but not limited to: ditch digging apparatus, well-boring
apparatus and road construction and maintenance machinery such as asphalt
spreaders, bituminous mixers, bucket loaders, tractors other than truck tractors,
leveling graders, finishing machines, motor graders, road rollers, scarifiers, earth-
moving carryalls and scrapers, power shovels and drag lines, and self-propelled
cranes and other earth-moving equipment.
Steady sound: a sound whose sound pressure level remains essentially constant
(that is, meter fluctuations are negligibly small) during the measurement period.
Meter variations are less than or equal to +/- 3 dB using the “slow” meter
characteristic.
Tactical military vehicle: every vehicle operated by any federal or state military
organization and designed for use in field operations, but not including vehicles
such as staff cars and personnel carriers designed primarily for normal highway
use.
Time-average sound level (or equivalent-continuous sound level or equivalent-
continuous frequency-weighted sound pressure level): 20 times the logarithm to
the base 10 of the ratio of the time-average (frequency-weighted) sound pressure
to the reference pressure of 20 micropascal. The frequency weighting used must
be specified explicitly (e.g., A, C or octave band). The unit of time-average
sound level is the decibel (dB).
Time-average (frequency-weighted) sound pressure: square root of the quotient
of the time integral of frequency-weighted squared instantaneous sound pressures
divided by the time period of integration; or the square root of the quotient of the
sound exposure, in pascal-squared seconds (Pa
2
–s), in a specified time period,
divided by the time period of integration in seconds. The frequency weighting
used must be specified explicitly (e.g., A, C or octave band). The unit of time-
average sound pressure is the pascal (Pa).
Unregulated safety relief valve: a safety relief valve used and designed to be
actuated by high pressure in the pipe or vessel to which it is connected and which
is used and designed to prevent explosion or other hazardous reaction from
pressure buildup, rather than being used and designed as a process pressure
blowdown.
Used motor vehicle: a motor vehicle that is not a new motor vehicle.
Vehicle: every device in, upon, or by which any person or property is or may be
transported or drawn upon a highway.
Weekday: any day which occurs during the period of time commencing at 10:00
p.m. Sunday and ending at 10:00 p.m. Friday during any particular week.
Weekend day: any day which occurs during the period of time commencing at
10:00 p.m. Friday and ending at 10:00 p.m. Sunday during any particular week.
Well-maintained muffler: any muffler which is free from defects which affect its
sound reduction. Such muffler shall be free of visible defects such as holes and
other acoustical leaks.
(Source: Amended at 27 Ill. Reg. 16247, effective October 8, 2003)
Section 900.102 Prohibition of Noise Pollution
No person shall cause or allow the emission of sound beyond the boundaries of his
property, as property is defined in Section 25 of the Illinois Environmental Protection
Act, so as to cause noise pollution in Illinois, or so as to violate any provision of this
Chapter.
Section 900.103 Measurement Procedures
a) Procedures Applicable to all of 35 Ill. Adm. Code: Subtitle H, Chapter I
The Agency may adopt procedures which set forth criteria for the
measurement of sound for all Parts except 35 Ill. Adm. Code 900 and 901.
Such procedures shall be in substantial conformity with standards and
recommended practices established by the American National Standards
Institute, Inc. (ANSI) or the Society of Automotive Engineers, Inc.
(SAE), incorporated by reference at Section 900.106. Such procedures
shall be revised from time to time to reflect current engineering judgment
and advances in noise measurement techniques. Such procedures, and
revisions, thereof, shall not become effective until filed with the
Administrative Code Division of the Office of the Secretary of State as
required by the Illinois Administrative Procedure Act [5 ILCS 100].
Measurement procedures for 35 Ill. Adm. Code 900 and 901 shall conform
to 35 Ill. Adm. Code 910.
b) Procedures Applicable only to 35 Ill. Adm. Code 901
1) All measurement and all measurement procedures to determine
whether emissions of sound comply with 35 Ill. Adm. Code 901
shall, with the exception of measurements to determine whether
emissions of sound comply with 35 Ill. Adm. Code 901.109, be
based on Leq averaging, as defined in 35 Ill. Adm. Code 900.101,
using a reference time as follows:
A) Except as specified in subsection (b)(1)(B) for steady
sound, a reference time of at least 1 hour shall be used for
all sound measurements and measurement procedures.
B) For measurement of steady sound as defined in Section 101
of this Part, the reference time shall be at least 10 minutes.
2) All measurements and measurement procedures under subsection
(b)(1)(B) of this Section must correct, or provide for the correction
of such emissions for the presence of ambient or background noise
in accordance with the procedures in 35 Ill. Adm. Code 910. All
measurements must be in conformity with the following ANSI
standards, incorporated by reference at Section 900.106:
A) ANSI S1.4-1983 (R2001) “American National Standard
Specification for Sound Level Meters.”
B) ANSI S1.6-1984 (R2001) “American National Standard
Preferred Frequencies, Frequency Levels, and Band
Numbers for Acoustical Measurements.”
C) ANSI S1.11-1986 (R1998) “American National Standard
Specification for Octave-Band and Fractional-Octave-Band
Analog and Digital Filters.”
D) ANSI S1.13-1995 (R1999) “American National Standard
Measurement of Sound Pressure Level in Air.”
E) ANSI S12.9-1993 (R1998) “American National Standard
Quantities and Procedures for Description and
Measurement of Environmental Sound - Part 3: Short-Term
Measurements With an Observer Present.”
c) Procedures Applicable only to 35 Ill. Adm. Code 902
1) Measurement procedures to determine whether emissions of sound
comply with 35 Ill. Adm. Code 902.120 through 902.123 must be
in conformity with the following ANSI standards incorporated by
reference at Section 900.106:
A) ANSI S1.4-1983 (R2001) “American National Standard
Specification for Sound Level Meters.”
B) ANSI S1.13-1995 (R1999) “American National Standard
Measurement of Sound Pressure Level in Air.”
2) The procedures for sound measurement under 35 Ill. Adm. Code
902.123 must conform to the ANSI standards prescribed in
subsection (c)(1), above, provided that the procedures are in
conformity with those established by the U.S. Department of
Transportation under 49 CFR 325 pursuant to Section 17 of the
Federal Noise Control Act of 1972, 42 USC §4901 et seq.
3) The Board may provide for measurement at distances other than
the 50 feet specified in 35 Ill. Adm. Code 902.120 through
902.123 provided that correction factors are applied so that the
sound levels so determined are substantially equivalent to those
measured at 50 feet and the measurement distance does not exceed
100 feet. The correction factors used shall be consistent with
California Highway Patrol Sound Measurement Procedures HPH
83.1 (October 1, 1973, as amended November 9, 1975),
incorporated by reference at Section 900.106.
d) Procedures Applicable only to 35 Ill. Adm. Code 905
1) Measurement procedures to determine whether emissions of sound
comply with 35 Ill. Adm. Code 905.102(a) and 905.103(a)(1)
must be in conformity with the following standards incorporated
by reference at Section 900.106:
A) ANSI S1.4-1983 (R2001) “American National Standard
Specification for Sound Level Meters.”
B) SAE Recommended Practice J192 “Exterior Sound Level
for Snowmobiles.” March 1985.
2) Measurement procedures to determine whether emissions of sound
comply with 35 Ill. Adm. Code 905.102(b) and 905.103(a)(2) shall
be in substantial conformity with the following standards
incorporated by reference at Section 900.106:
A) ANSI S1.4-1983 (R2001) “American National Standard
Specification for Sound Level Meters.”
B) SAE/ANSI Recommended Practice J1161 “Operational
Sound Level Measurement Procedure for Snow Vehicles”,
March 1983.
3) The Agency may establish criteria for measuring at distances other
than the 50 feet specified in 35 Ill. Adm. Code 905.102 and
905.103, provided that correction factors are applied so that the
sound levels so determined are substantially equivalent to those
measured at 50 feet. In adopting new or revised criteria, the
Agency shall comply with the requirements of the Illinois
Administrative Procedure Act, [5 ILCS 100].
(Source: Amended at 27 Ill. Reg. 16247, effective October 8, 2003)
Section 900.104 Burden of Persuasion Regarding Exceptions
In any proceeding pursuant to this Chapter, if an exception stated in this Chapter would
limit an obligation, limit a liability, or eliminate either an obligation or a liability, the
person who would benefit from the application of the exception shall have the burden of
persuasion that the exception applies and that the terms of the exception have been met.
The Agency shall cooperate with and assist persons in determining the application of the
provisions of this Chapter.
Section 900.105 Severability
If any provision of these rules or regulations is adjudged invalid, or if the application
thereof to any person or in any circumstances is adjudged invalid, such invalidity shall
not affect the validity of this Chapter as a whole or of any part, sub-part, sentence or
clause thereof not adjudged invalid.
Section 900.103 Measurement Procedures
a) Procedures Applicable to all of 35 Ill. Adm. Code: Subtitle H, Chapter I
The Agency may adopt procedures which set forth criteria for the
measurement of sound for all Parts except 35 Ill. Adm. Code 900 and 901.
Such procedures shall be in substantial conformity with standards and
recommended practices established by the American National Standards
Institute, Inc. (ANSI) or the Society of Automotive Engineers, Inc.
(SAE), incorporated by reference at Section 900.106. Such procedures
shall be revised from time to time to reflect current engineering judgment
and advances in noise measurement techniques. Such procedures, and
revisions, thereof, shall not become effective until filed with the
Administrative Code Division of the Office of the Secretary of State as
required by the Illinois Administrative Procedure Act [5 ILCS 100].
Measurement procedures for 35 Ill. Adm. Code 900 and 901 shall conform
to 35 Ill. Adm. Code 910.
b) Procedures Applicable only to 35 Ill. Adm. Code 901
1) All measurement and all measurement procedures to determine
whether emissions of sound comply with 35 Ill. Adm. Code 901
shall, with the exception of measurements to determine whether
emissions of sound comply with 35 Ill. Adm. Code 901.109, be
based on Leq averaging, as defined in 35 Ill. Adm. Code 900.101,
using a reference time as follows:
A) Except as specified in subsection (b)(1)(B) for steady
sound, a reference time of at least 1 hour shall be used for
all sound measurements and measurement procedures.
B) For measurement of steady sound as defined in Section 101
of this Part, the reference time shall be at least 10 minutes.
2) All measurements and measurement procedures under subsection
(b)(1)(B) of this Section must correct, or provide for the correction
of such emissions for the presence of ambient or background noise
in accordance with the procedures in 35 Ill. Adm. Code 910. All
measurements must be in conformity with the following ANSI
standards, incorporated by reference at Section 900.106:
A) ANSI S1.4-1983 (R2001) “American National Standard
Specification for Sound Level Meters.”
B) ANSI S1.6-1984 (R2001) “American National Standard
Preferred Frequencies, Frequency Levels, and Band
Numbers for Acoustical Measurements.”
C) ANSI S1.11-1986 (R1998) “American National Standard
Specification for Octave-Band and Fractional-Octave-Band
Analog and Digital Filters.”
D) ANSI S1.13-1995 (R1999) “American National Standard
Measurement of Sound Pressure Level in Air.”
E) ANSI S12.9-1993 (R1998) “American National Standard
Quantities and Procedures for Description and
Measurement of Environmental Sound - Part 3: Short-Term
Measurements With an Observer Present.”
c) Procedures Applicable only to 35 Ill. Adm. Code 902
1) Measurement procedures to determine whether emissions of sound
comply with 35 Ill. Adm. Code 902.120 through 902.123 must be
in conformity with the following ANSI standards incorporated by
reference at Section 900.106:
A) ANSI S1.4-1983 (R2001) “American National Standard
Specification for Sound Level Meters.”
B) ANSI S1.13-1995 (R1999) “American National Standard
Measurement of Sound Pressure Level in Air.”
2) The procedures for sound measurement under 35 Ill. Adm. Code
902.123 must conform to the ANSI standards prescribed in
subsection (c)(1), above, provided that the procedures are in
conformity with those established by the U.S. Department of
Transportation under 49 CFR 325 pursuant to Section 17 of the
Federal Noise Control Act of 1972, 42 USC §4901 et seq.
3) The Board may provide for measurement at distances other than
the 50 feet specified in 35 Ill. Adm. Code 902.120 through
902.123 provided that correction factors are applied so that the
sound levels so determined are substantially equivalent to those
measured at 50 feet and the measurement distance does not exceed
100 feet. The correction factors used shall be consistent with
California Highway Patrol Sound Measurement Procedures HPH
83.1 (October 1, 1973, as amended November 9, 1975),
incorporated by reference at Section 900.106.
d) Procedures Applicable only to 35 Ill. Adm. Code 905
1) Measurement procedures to determine whether emissions of sound
comply with 35 Ill. Adm. Code 905.102(a) and 905.103(a)(1)
must be in conformity with the following standards incorporated
by reference at Section 900.106:
A) ANSI S1.4-1983 (R2001) “American National Standard
Specification for Sound Level Meters.”
B) SAE Recommended Practice J192 “Exterior Sound Level
for Snowmobiles.” March 1985.
2) Measurement procedures to determine whether emissions of sound
comply with 35 Ill. Adm. Code 905.102(b) and 905.103(a)(2) shall
be in substantial conformity with the following standards
incorporated by reference at Section 900.106:
A) ANSI S1.4-1983 (R2001) “American National Standard
Specification for Sound Level Meters.”
B) SAE/ANSI Recommended Practice J1161 “Operational
Sound Level Measurement Procedure for Snow Vehicles”,
March 1983.
3) The Agency may establish criteria for measuring at distances other
than the 50 feet specified in 35 Ill. Adm. Code 905.102 and
905.103, provided that correction factors are applied so that the
sound levels so determined are substantially equivalent to those
measured at 50 feet. In adopting new or revised criteria, the
Agency shall comply with the requirements of the Illinois
Administrative Procedure Act, [5 ILCS 100].
(Source: Added at 27 Ill. Reg. 16247, effective October 8, 2003)
Section 900.APPENDIX A Old Rule Numbers Referenced
The following table is provided to aid in referencing old Board rule numbers to section
numbers pursuant to codification.
Old Part 1 of Chapter 8
35 Ill. Adm. Code Part 900
Rule 101
Section 900.101
Rule 102
Section 900.102
Rule 103
Section 900.103
Rule 104
Section 900.104
Rule 105
Section 900.105